Process for tracking and monitoring a manufacturing unit and/or a near-infrared spectrometer by means of at least one criterion of quality of sets of spectra
First Claim
1. Process for tracking and monitoring the operation of a unit for manufacturing a product and/or a near-infrared spectrometer fed with said product, said spectrometer delivering spectra consisting of series of values of absorbance for various values of wavelengths, consisting in executing the following steps:
- periodically recording, in the form of numerical data, spectra arising from the near-infrared spectrometer,mathematically transforming the numerical data of each recorded spectrum so as to obtain transformed spectra,characterized in that it consists in executing the following steps also;
constructing a string of work spectra from the values previously obtained, by choosing wavelengths in each transformed spectrum, by a method of selection,selecting from the string of work spectra, a first set of work spectra containing from 20 to 50 consecutive spectra,selecting from the string of work spectra, a second set of work spectra, of the same dimension as the first set, said spectra being consecutive and shifted in time with respect to the spectra of the first set,computing at least one quality criterion so as to intercompare the first and second sets of spectra,tracking the evolution of said quality criterion over time.
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Abstract
A process for tracking and monitoring the operation of a unit for manufacturing a product and/or a near-infrared spectrometer fed with the product. The process includes periodically recording spectra arising from the near-infrared spectrometer, mathematically transforming the spectra, computing at least one quality criterion, intercomparing two sets of spectra after transformation, and tracking the evolution of this criterion over time. The process finds its application in the chemical, petroleum, pharmaceutical, cosmetological, and agro-food industries.
39 Citations
20 Claims
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1. Process for tracking and monitoring the operation of a unit for manufacturing a product and/or a near-infrared spectrometer fed with said product, said spectrometer delivering spectra consisting of series of values of absorbance for various values of wavelengths, consisting in executing the following steps:
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periodically recording, in the form of numerical data, spectra arising from the near-infrared spectrometer, mathematically transforming the numerical data of each recorded spectrum so as to obtain transformed spectra, characterized in that it consists in executing the following steps also; constructing a string of work spectra from the values previously obtained, by choosing wavelengths in each transformed spectrum, by a method of selection, selecting from the string of work spectra, a first set of work spectra containing from 20 to 50 consecutive spectra, selecting from the string of work spectra, a second set of work spectra, of the same dimension as the first set, said spectra being consecutive and shifted in time with respect to the spectra of the first set, computing at least one quality criterion so as to intercompare the first and second sets of spectra, tracking the evolution of said quality criterion over time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification